RE: Water Heater Check Valve
Check valve serves one purpose..replace the cost/installation of another shutoff valve.
Check valves are installed by RV MFG....not by water heater mfg.
Check valve in WH hot out is to prevent backflow into WH when WH is bypassed.
Check valve i WH cold is to prevent Hot backflow into cold system....which really is minimal w/o that check valve and only when system is stagnant (no flow). As soon as there is flow (hot or cold)---end of ANY hot into cold.
If you 'winterize' using anti-freeze then it will get into WH
So replace check valve (better quality---brass vs that cheap plastic junk)
OR be done with it and install a shutoff valve on hot out so it can be closed when WH is bypassed.
This correct.
It is NOT a safety device nor does it keep cold water from entering the hot side of the water heater.

RE: RV Air Conditioner 101 for Newbies
A properly installed and functioning RV should operate successfully in any climate with the fan on high or low speed.
Correct.
The number one reason I have found for a freezing coil is dirty filters.
Second most common problem was missing foam tape or defecticpve sealing tape between the intake (return) section and the output (supply) section.

RE: Rafting the Colorado river
I have and it was one of my life's highlights.
We hiked down into the Grand Canyon via the Kaibob Trail to join a trip. We were picked up at the end by a helicopter back up to the rim. Very cool.
The last night on the river, a guides father flew his plane into the canyon and dropped 5-gallon buckets of ice cream into the river which we promptly retrieved.
Along on our trip was my roommates brother in law, Richard Edlund who was head of special effects for George Lucas and the first few Starwars movies.
He brought along some high-end video equipment and produced a nic video of our trip. This was over 32 years ago so I am sure things have changed. Do it!

RE: Awning leakage
Take a close look and see if the awning rail is spliced together where it leaks.
Mine was and I needed to silicone it to make it stop.
Mine even leaked from the run off of condensation from the roof air.

RE: Sudden hearing loss... UPDATE (good news)
I lost complete hearing in my left ear very suddenly and unexpectedly a little over 2 weeks ago and it is accompanied by horrendous ringing (tinnitus.)
The ENT specialist diagnosed it as a mini-stroke (an extended transient ischemic attack) that occurred in the blood supply to my ear parts. Yes, it is a stroke, but not the kind that results in loss of arms or legs or facial droop normally associated with a stroke; it did affect one side in my ear. We are trying meds and in another 2 weeks I will go for another hearing test.
As of now, I cannot hear out of my left ear. I am trying to adapt to this new situation. Anyone experience this specific situation (1 ear only and sudden) and how are you coping?
Thanks.
This will probably be deleted, but, for the life of me I don't understand why someone who has been diagnosed and is under medical care would come to an RV forum for advice. Seriously, you think that people here can come up with better? Advice? Wait until the people you are paying to advise you.
The OP is only asking about how others similarly affected are coping with this problem, not for advice. Unless the OP's "people he is paying" have the same condition, they can't offer the information regarding coping he is asking for.
Read and understand what is written here before responding with an inappropriate response.